已解决：Elasticsearch报错：exception [type=search_phase_execution_exception, reason=all shards failed]

Exception in thread "main" ElasticsearchStatusException[Elasticsearch exception [type=search_phase_execution_exception, reason=all shards failed]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]];
at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:177)
at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:1727)
at org.elasticsearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:1704)
at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1467)
at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1424)
at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1394)
at org.elasticsearch.client.RestHighLevelClient.search(RestHighLevelClient.java:930)
at com.softsec.util.demoTime.main(demoTime.java:98)
Suppressed: org.elasticsearch.client.ResponseException: method [POST], host [http://192.168.101.92:9200], URI [/news/_search?typed_keys=true&ignore_unavailable=false&expand_wildcards=open&allow_no_indices=true&ignore_throttled=true&search_type=query_then_fetch&batched_reduce_size=512&ccs_minimize_roundtrips=true], status line [HTTP/1.1 400 Bad Request]
{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query","grouped":true,"failed_shards":[{"shard":0,"index":"news","node":"8GuMfo5aRz2CCgl49bY0aQ","reason":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}],"caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.","caused_by":{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set fielddata=true on [content_type] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."}}},"status":400}
at org.elasticsearch.client.RestClient.convertResponse(RestClient.java:253)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:231)
at org.elasticsearch.client.RestClient.performRequest(RestClient.java:205)
at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1454)
... 4 more

这个原因是因为我的分组聚合查询的字符串（content_type）类型是text类型

原因分析：

当使用到term 查询的时候，由于是精准匹配，所以查询的关键字在es上的类型，必须是keyword而不能是text，比如你的搜索条件是 ”name”:”蔡虚坤”,那么该name 字段的es类型得是keyword，而不能是text

在es中，只有keyword类型的字符串可以使用AggregationBuilders.terms("aggs-class")来分组聚合，想要分组查询，指定根据分组字段的keyword属性就可以了（如下图）；

在我们的Java代码中怎么修改呢?如下，加上".keyword"就可以了

之前的报错下面追加上：

分片配置

•在创建索引时，如果不指定分片配置，则默认主分片1，副本分片1。

•在创建索引时，可以通过settings设置分片

在这里插入图片描述

分片配置

#分片配置
#"number_of_shards": 3, 主分片数量
#"number_of_replicas": 1  主分片备份数量，每一个主分片有一个备份
# 3个主分片+3个副分片=6个分片
PUT cluster_test1
{
  "settings": {
    "number_of_shards": 3,
    "number_of_replicas": 1
  }, 
  "mappings": {
    "properties": {
      "name":{
        "type": "text"
      }
    }
  }
}

1.三个节点正常运行（0、1、2分片标号）

在这里插入图片描述